Update 2024-03-01-数学学习.md

nooblong · Aug 27, 2024 · 5b5c422 · 5b5c422
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commit 5b5c422
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/_posts/2024-03-01-数学学习.md b/_posts/2024-03-01-数学学习.md
@@ -299,11 +299,11 @@ x3 = 1/2 * 161/72 + 5/2 * 161/72
 
 slove (64.1)^(1/3) ~= ?
 
-y = x^1/3, dy = 1/3^(-2/3) dx
+y = x^1/3, dy = 1/3^(-2/3) dx（dy，dx视作无限小，只是题目取1/10）
 
 A + x = 64, y = 64^(1/3) = 4
 
-dy = 1/3(64)^(-2/3) dx = 1/3 * 1/16 dx = 1/48 dx
+dy = 1/3(64)^(-2/3) dx = 1/3 * 1/16 dx = 1/48 dx （线性近似结果）
 
 dx = 1/10, dy = 1/48 dx = 1/480